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9712c6e2 SG |
1 | /* BFD back end for traditional Unix core files (U-area and raw sections) |
2 | Copyright (C) 1988, 1989, 1991 Free Software Foundation, Inc. | |
3 | Written by John Gilmore of Cygnus Support. | |
4 | ||
5 | This file is part of BFD, the Binary File Descriptor library. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
ff37ea55 JG |
20 | |
21 | /* This file does not define a particular back-end, but it defines routines | |
22 | that can be used by other back-ends. */ | |
7ed4093a | 23 | #include <sysdep.h> |
ff37ea55 JG |
24 | #include "bfd.h" |
25 | #include <stdio.h> | |
26 | #include "libbfd.h" | |
27 | ||
359f1dee | 28 | #include "libaout.h" /* BFD a.out internal data structures */ |
ff37ea55 JG |
29 | |
30 | #include <sys/types.h> | |
31 | #include <sys/param.h> | |
32 | #include <sys/dir.h> | |
33 | #include <signal.h> | |
34 | #include <machine/reg.h> | |
35 | ||
36 | #include <sys/user.h> /* After a.out.h */ | |
37 | #include <sys/file.h> | |
ff37ea55 JG |
38 | |
39 | #include <errno.h> | |
40 | ||
41 | /* need this cast b/c ptr is really void * */ | |
42 | #define core_hdr(bfd) (((struct core_data *) (bfd->tdata))->hdr) | |
43 | #define core_datasec(bfd) (((struct core_data *) ((bfd)->tdata))->data_section) | |
44 | #define core_stacksec(bfd) (((struct core_data*)((bfd)->tdata))->stack_section) | |
45 | #define core_regsec(bfd) (((struct core_data *) ((bfd)->tdata))->reg_section) | |
46 | #define core_upage(bfd) (((struct core_data *) ((bfd)->tdata))->upage) | |
47 | ||
48 | /* These are stored in the bfd's tdata */ | |
49 | struct core_data { | |
50 | struct user *upage; /* core file header */ | |
51 | asection *data_section; | |
52 | asection *stack_section; | |
53 | asection *reg_section; | |
54 | }; | |
55 | ||
7ed4093a | 56 | /* ARGSUSED */ |
ff37ea55 JG |
57 | bfd_target * |
58 | trad_unix_core_file_p (abfd) | |
59 | bfd *abfd; | |
60 | { | |
9712c6e2 | 61 | #if HOST_SYS == SUN4_SYS |
ff37ea55 JG |
62 | return 0; |
63 | #else | |
64 | int val; | |
65 | char *rawptr; | |
66 | struct user u; | |
67 | unsigned int reg_offset, fp_reg_offset; | |
68 | ||
69 | /* 4.2-style (and perhaps also sysV-style) core dump file. */ | |
70 | ||
71 | val = bfd_read ((void *)&u, 1, sizeof u, abfd); | |
72 | if (val != sizeof u) | |
73 | return 0; /* Too small to be a core file */ | |
74 | ||
75 | /* Sanity check perhaps??? */ | |
76 | if (u.u_dsize > 0x1000000) /* Remember, it's in pages... */ | |
77 | return 0; | |
78 | if (u.u_ssize > 0x1000000) | |
79 | return 0; | |
80 | /* Check that the size claimed is no greater than the file size. FIXME. */ | |
81 | ||
82 | /* OK, we believe you. You're a core file (sure, sure). */ | |
83 | ||
84 | /* Allocate both the upage and the struct core_data at once, so | |
85 | a single free() will free them both. */ | |
86 | rawptr = (char *)zalloc (sizeof (u) + sizeof (struct core_data)); | |
87 | if (rawptr == NULL) { | |
88 | bfd_error = no_memory; | |
89 | return 0; | |
90 | } | |
91 | ||
92 | set_tdata (abfd, (struct core_data *)rawptr); | |
93 | core_upage (abfd) = (struct user *)(rawptr + sizeof (struct core_data)); | |
94 | *core_upage (abfd) = u; /* Save that upage! */ | |
95 | ||
96 | /* create the sections. This is raunchy, but bfd_close wants to reclaim | |
97 | them */ | |
98 | core_stacksec (abfd) = (asection *) zalloc (sizeof (asection)); | |
99 | if (core_stacksec (abfd) == NULL) { | |
100 | loser: | |
101 | bfd_error = no_memory; | |
102 | free ((void *)rawptr); | |
103 | return 0; | |
104 | } | |
105 | core_datasec (abfd) = (asection *) zalloc (sizeof (asection)); | |
106 | if (core_datasec (abfd) == NULL) { | |
107 | loser1: | |
108 | free ((void *)core_stacksec (abfd)); | |
109 | goto loser; | |
110 | } | |
111 | core_regsec (abfd) = (asection *) zalloc (sizeof (asection)); | |
112 | if (core_regsec (abfd) == NULL) { | |
113 | loser2: | |
114 | free ((void *)core_datasec (abfd)); | |
115 | goto loser1; | |
116 | } | |
117 | ||
118 | core_stacksec (abfd)->name = ".stack"; | |
119 | core_datasec (abfd)->name = ".data"; | |
120 | core_regsec (abfd)->name = ".reg"; | |
121 | ||
122 | core_stacksec (abfd)->flags = SEC_ALLOC + SEC_LOAD; | |
123 | core_datasec (abfd)->flags = SEC_ALLOC + SEC_LOAD; | |
124 | core_regsec (abfd)->flags = SEC_ALLOC; | |
125 | ||
126 | core_datasec (abfd)->size = NBPG * u.u_dsize; | |
127 | core_stacksec (abfd)->size = NBPG * u.u_ssize; | |
128 | core_regsec (abfd)->size = NBPG * UPAGES; /* Larger than sizeof struct u */ | |
129 | ||
130 | /* What a hack... we'd like to steal it from the exec file, | |
131 | since the upage does not seem to provide it. FIXME. */ | |
9712c6e2 SG |
132 | #ifdef HOST_DATA_START_ADDR |
133 | core_datasec (abfd)->vma = HOST_DATA_START_ADDR; | |
134 | #else | |
135 | core_datasec (abfd)->vma = HOST_TEXT_START_ADDR + (NBPG * u.u_tsize); | |
136 | #endif | |
137 | core_stacksec (abfd)->vma = HOST_STACK_END_ADDR - (NBPG * u.u_ssize); | |
ff37ea55 JG |
138 | core_regsec (abfd)->vma = -1; |
139 | ||
140 | core_datasec (abfd)->filepos = NBPG * UPAGES; | |
141 | core_stacksec (abfd)->filepos = (NBPG * UPAGES) + NBPG * u.u_dsize; | |
142 | core_regsec (abfd)->filepos = 0; /* Register segment is the upage */ | |
143 | ||
144 | /* Align to word at least */ | |
145 | core_stacksec (abfd)->alignment_power = 2; | |
146 | core_datasec (abfd)->alignment_power = 2; | |
147 | core_regsec (abfd)->alignment_power = 2; | |
148 | ||
149 | abfd->sections = core_stacksec (abfd); | |
150 | core_stacksec (abfd)->next = core_datasec (abfd); | |
151 | core_datasec (abfd)->next = core_regsec (abfd); | |
152 | abfd->section_count = 3; | |
153 | ||
154 | return abfd->xvec; | |
155 | #endif | |
156 | } | |
157 | ||
158 | char * | |
159 | trad_unix_core_file_failing_command (abfd) | |
160 | bfd *abfd; | |
161 | { | |
162 | if (*core_upage (abfd)->u_comm) | |
163 | return core_upage (abfd)->u_comm; | |
164 | else | |
165 | return 0; | |
166 | } | |
167 | ||
7ed4093a | 168 | /* ARGSUSED */ |
ff37ea55 | 169 | int |
7ed4093a SC |
170 | trad_unix_core_file_failing_signal (ignore_abfd) |
171 | bfd *ignore_abfd; | |
ff37ea55 JG |
172 | { |
173 | return -1; /* FIXME, where is it? */ | |
174 | } | |
175 | ||
7ed4093a | 176 | /* ARGSUSED */ |
ff37ea55 JG |
177 | boolean |
178 | trad_unix_core_file_matches_executable_p (core_bfd, exec_bfd) | |
179 | bfd *core_bfd, *exec_bfd; | |
180 | { | |
181 | return true; /* FIXME, We have no way of telling at this point */ | |
182 | } |